Brown rat, (Rattus norvegicus), species of rat (family Muridae) found on every continent except Antarctica. The alternate name “Norway rat” came from a false hypothesis widely believed in 18th-century England that the rats were native to Norway. Resear
The impression at that time was that the initial disease had originated in the tubes and ovaries. Microscopic sections of the mass (Fig. 6) revealed the remains of the left tube with foci of typical Actinomyces colonies, surrounded with inflammatory cells and debris. Fig. 6. Actinomy...
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whereas criollo varieties are verysusceptibleto disease and are not widely grown. Trinitario is a hybrid of the forastero and criollo varieties and produces a flavourful bean that is used in high-quality dark chocolate. InCentral Americatwo related species (T. bicolorandT. angustifolium) are grown...
But throughout most of history, people only saw a horrible, disfiguring disease that no one knew how to prevent or remedy. Scientists believe that the disease originated in Africa, and may have spread to the Middle East about 3000 B.C.E. [source:Robbins et al.]. It's mentioned in the...
As for the second point, since SNPs are randomly assigned in the process of meiosis, this study has fulfilled the requirements. Genetic data on periodontal disease originated from three distinct GWAS consortia, while IMID genetic information was derived from two independent GWAS consortia. These ...
The diverse geographic distribution of HA genes of B/Victoria and A/H3N2 had drastically reduced, and most strains originated from China. The rate of B/Victoria HA evolution (3.11 × 10−3, P < 0.05) was 1.7 times faster than before the COVID-19 outbreak (1.80 × 10...
“As we have not found any sexually transmitted syphilis in South America, the theory that Columbus brought syphilis to Europe seems to appear more improbable,” agrees Schünemann. In point of fact, earlier discoveries by her group, for example in Finland and Poland, suggest...
But while Hippocrates provides the first proof of cholera beyond a reasonable doubt, the disease likely originated along the Ganges River while Athens was still a very young place. Cholera lives in many of the world's water sources, but it's most dangerous when it has an environment in ...
This article focuses on a study according to which more infectious diseases emerge in North. A preview of a new global map of emerging infectious diseases turns a common assumption on its head. The map suggests that the majority of emerging diseases originated in Europe, North America, and ...